Euphorbia hexagona Nutt. ex Spreng.
Family: Euphorbiaceae
six-angle spurge,  more...
[Zygophyllidium hexagonum (Nutt. ex Spreng.) Small]
Euphorbia hexagona image
from USDA Plants website  
Etymology: Euphorbia: for Euphorbus, corpulent Greek physician of Juba II, King of Mauretania. Juba, educated in Rome, and married to daughter of Antony and Cleopatra. From eu, "good" and phorbe, "pasture or fodder," thus giving euphorbos the meaning "well fed."
Plants: erect, annual, 4"-20" tall forb; stems numerous, opposite, very slender but with a main stem
Leaves: mostly opposite, sharp pointed, under 0.2" wide
Flowers: yellow to green, 5-parted, no petals or sepals, surrounded by petal-like parts
Fruits: gray, 3-lobed, capsule
Habitat: prairies, plains, barrens
Conservation Status: Introduced - adventive
Euphorbia hexagona image
Marcie O'Connor  
Euphorbia hexagona image
Marcie O'Connor  
Euphorbia hexagona image
Marcie O'Connor  
Euphorbia hexagona image
Marcie O'Connor  
Euphorbia hexagona image
from USDA Plants website  
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